Sound problem with Pidgin

Hello,
I just reinstalled windows (Now Vista 64-bit), and I also reinstalled pidgin. For some reason I can not hear any sound from pidgin when I receive messages, send messages or some logs on or off. Are there any causes/fixes for this problem?
Thanks,
Nick
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://pidgin.im/pipermail/support/attachments/20080722/3acbeb3d/attachment.html>